US4283252A - Method and apparatus for producing fiber pulp from fibrous lignocellulose containing material - Google Patents

Method and apparatus for producing fiber pulp from fibrous lignocellulose containing material Download PDF

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Publication number
US4283252A
US4283252A US06/160,253 US16025380A US4283252A US 4283252 A US4283252 A US 4283252A US 16025380 A US16025380 A US 16025380A US 4283252 A US4283252 A US 4283252A
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Prior art keywords
grinding
housing
steam
temperature
chips
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US06/160,253
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English (en)
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Rolf B. Reinhall
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D21D1/30—Disc mills

Definitions

  • This invention relates to a method for producing pulp from fibrous ligno-cellulose containing material, in which the pulp material, such as wood chips, is disintegrated in a grinding apparatus which comprises at least two opposing grinding discs which rotate relatively to one another under axial pressure within a housing. The material is introduced from a supply passage into the grinding space between the discs at the inner radial portion thereof and is propelled outwards in an atmosphere of steam or gas.
  • the supply passage usually includes a vessel in which the material to be ground is preheated by a heating medium, such as steam, under atmospheric or higher pressure, before it is fed into the grinding space.
  • a heating medium such as steam
  • the fiber pulp in this manner acquires favorable properties for production of paper and the like, namely, with regard to brightness and strength, if the grinding process is carried out at a temperature ranging between 100° C. and 140° C. preferably 118° C.-125° C., and at a corresponding steam pressure, since the treatment is of short duration and the concentration or dryness of the pulp is relatively high, such as 15%-14%.
  • thermo-mechanical pulping method is that chemicals can be dispensed with to a substantial degree, which is important for environmental reasons, among others.
  • the invention contemplates a novel method for producing fiber pulp which can be carried out in a substantially simplified apparatus for preheating and process control, while still imparting to the final pulp the same or even better properties than those obtained by the above-described thermo-mechanical method.
  • the invention is based on the concept that the separation of the fibers is dependent on the temperature to which the middle lamellae, by which the fibers are bonded together, are heated during the initial state.
  • the middle lamellae, which surround the different fiber walls, are rich in lignin, which, during heating, are successively transformed from a hard or rigid condition into a more semi-rigid state, in order thereafter to acquire a gradually increasing degree of stickiness.
  • the raw material has been fed from a preheater or steaming chamber to the inlet side of the grinding space by conveyor means, such as a screw conveyor, and sometimes in combination with dewatering of the material, which results only in a limited compression of the material, so that, when the grinding operation takes place in a steam environment, there is a relatively free flow of steam through the conveyor means.
  • conveyor means such as a screw conveyor
  • the steam flow results from steam generated between the grinding discs during the grinding operation by partial conversion of the great amount of mechanical energy into heat.
  • the initial grinding phase will be carried out in a steam atmosphere which will raise the temperature of the material upon its entry into a first zone of the grinding space towards the softening point of the middle lamella.
  • the invention is essentially characterized by the feature that the supply passage and/or the steaming chamber are separated from the inlet of the grinding space in a steam-tight manner by the pulp material itself.
  • the pulp material is compressed before it is introduced into the grinding space and preferably dewatered to such a degree as to form a steam-tight plug.
  • the pulp material during its passage from the supply passage to the grinding apparatus, is kept at such a temperature that the softening point of the middle lamella will first be reached after the material has passed into an inner zone and undergone a grinding operation therein. Due to the short dwell-time in the steam atmosphere, the temperature of the material during the initial grinding will not go so high as to reach the softening point of the middle lamella, but will be kept safely below this temperature.
  • the material in the first grinding zone can essentially be maintained at the same temperature that it has in the supply passage and steaming chamber.
  • the fibers are unravelled during the initial grinding to expose the different fiber layers or fiber walls.
  • the temperature is increased by the generated steam to produce the required treatment condition for complete fiber separation and fibrillation, resulting in a fiber pulp which has extraordinary properties which make it useful particularly for paper making.
  • the method according to the invention results in improved fibrillation and swelling of the fibers, while maintaining the fiber length intact.
  • the final result will be improved due to the fact that the preheating or steaming step can take place at a temperature level where the middle lamella is softened to such a degree that the fiber separation takes place in the fiber wall under conditions which to a high degree favorably affect the properties of the final pulp.
  • the supply passage formed with a steaming chamber is supplied with a heating medium preferably steam, so as to establish a temperature therein of not more than 100° C.
  • a heating medium preferably steam, so as to establish a temperature therein of not more than 100° C.
  • Superatmospheric pressure is maintained in the grinding apparatus which can be produced entirely by the steam generated during the grinding operation. The amount of energy consumed by the rotating disc or discs of the grinding apparatus is great and is converted by friction, etc., partly into heat, which causes the water accompanying the pulp material in the grinding space to be converted into steam.
  • This superatmospheric steam pressure can be maintained at a predetermined value in known manner by a sensor for controlling the discharge area in a blow valve located in the discharge duct of the grinding housing.
  • FIG. 2 is a partial sectional view of the apparatus shown in FIG. 1, drawn to an enlarged scale.
  • the reference numeral 10 designates a hopper or bin for the raw material, such as wood chips, which are conveyed by the screw conveyor 12 into the steaming chamber 14, in which the chips are heated to a temperature not exceeding 100° C., for example, by steam, which is introduced through the conduit 16 equipped with a valve 17.
  • the steaming chamber is preferably under atmospheric pressure.
  • the chips are conveyed by screw conveyor 18 in the bottom of the steaming chamber 14 to the grinding apparatus or defibrator 24.
  • the compressor throat 22 has a conical bore tapering in the direction of the movement of the material, within which the screw 26 of correspondingly conical profile is rotatably disposed.
  • a counterpressure member 27 which may be a tubular connector piece 84 within which vanes or flaps 28 are pivotally disposed for actuation by the piston servomotor 30, so as to be swung into the inner bore 32 of the connector piece, which bore suitably forms a cylindrical extension of the end of the screw compressor 26.
  • the cross-sectional flow area of the bore can be reduced with resultant high degree of compression of the pulp material, such as wood chips.
  • the pulp material normally contains water, which, during the compression is pressed out through the perforations 34 in the throat 22 and removed through the funnel 35.
  • the grinding apparatus or defibrator 24 comprises a pair of grinding discs which are disposed in the housing 36.
  • one of the discs 38 is stationary and connected to the housing, while disc 40 is mounted on drive shaft 44, which is driven by a motor 42.
  • a servo motor 45 is disposed between the motor and the rotating grinding disc 49, in known manner, as shown, for example, in Swedish Pat. No. 179,337, which servo-motor, by means of an axially displaceable non-rotatable piston, transmits the pressure of a hydraulic pressure medium through bearings to the rotating axel 44 in order to create the high pressure which is required for grinding the material as it passes radially outward in the grinding space 48 between the two facing grinding discs.
  • a conduit 50 equipped with a blow valve 52 is connected to the bottom of grinding housing 30 for discharging the finished fiber pulp.
  • a pressure is maintained which is controlled by a sensor 54.
  • the open discharge area of the blow valve 52 is adjusted by means of a servo motor 56, in which reciprocates a piston 58 which is connected to the movable body of the blow valve 52.
  • the servo motor is supplied with pressure medium through the conduits 62, which terminate at each side of the piston 58 and are connected to a regulator 64.
  • the latter communicates with a source of pressure medium through the conduit 66 and is actuated by a sensor 54 through conduit 68.
  • a pipe 70 suitably having a cylindrical bore, the free end of which is located closely adjacent the rotating grinding disc 40. Furthermore, the pipe 70 is arranged eccentrically relative to the axis of rotation of the grinding disc in order to enhance the breaking-up of the highly compressed plug before the pulp material is introduced into the grinding space 48 between the grinding discs.
  • the plug may suitably be broken up by one or more vanes 72 on the disc 40 directly in front of the mouth of the pipe 70. The material is so compact when it is pressed forward in the pipe 70, that it must be broken up into its earlier condition by special means.
  • the pulp material As the pulp material is compressed by the compressor means 22, 27, a plug of compacted material is formed in the bore of the pipe 70, which prevents passage of steam therethrough. Furthermore, the material has a temperature which is so low that the middle lamellae, which bond the fibers together, lie below or on the lower portion of the softening curve. The material may thus have a temperature ranging from somewhat above room temperature and upwards to 100° C.
  • the dry content of the material should be high, just as in the aforementioned thermo-mechanical process, namely 15%-40%, which is regulated by the addition of water at locations 74 and/or 76.
  • the fiber material comes in contact with an environment of steam which has a temperature higher than that of the material in the inner grinding zone, so that fibrillation of the pulp can be carried out under most favorable conditions.
  • the pressure and attendant temperature of the steam environment in the grinding housing can be varied by adjustment of the blow valve 52 and sensor 54.
  • the discharge conduit 50 may be connected to a cyclone 80, where the ground fiber pulp is separated from the accompanying steam.
  • the space between the grinding housing and the bore of pipe 70, in which the steam-tight plug is maintained and advanced towards the disintegrating means 72 on the grinding disc 38, is sealed from the outside by means of a sleeve 82, so that steam cannot leak out between the throttling flaps 28.
  • properties suitable for different applications of use can be imparted to the pulp by varying the temperature and pressure of the steam in the grinding housing.
  • the steam temperature above 100° C. is selected within the range of 115° C.-135° C., a thermo-mechanical pulp of optimum fibrillation is obtained.
  • the temperature should exceed 135° C. the pulp fibers will unravel and separate without any appreciable fibrillation.
  • the powerful compression of the starting material, such as chips, ahead of the grinding apparatus produces a preliminary treatment and softening of the material to a certain degree, which favorably affects the subsequent grinding process.
  • the compressing feeding system according to the invention can even serve to uniformly distribute the liquid and separate out the undesired surplus.
  • Feed screws which simultaneously compress the fiber material are known per se and have been used for a long time for removing water and air from the pores of the material before impregnation with chemicals. When the pressure is subsequently released while the compressed material is submerged in the liquid chemical solution, the latter will be sucked into the pores so that the fiber material will become thoroughly impregnated. In this connection, however, it is not a question of creating a steamtight plug of the wood chips to prevent blow-back of superatmospheric steam generated in the grinding apparatus.
  • the invention is not limited to the disclosed embodiments, but may find a variety of expressions within the scope of the inventive concept.
  • the steaming chamber may be accomplished by introduction of a non-condensable gas, such as air, of proper temperature and pressure, so that the chips also in this case are heated to a temperature below that of the temperature prevailing in the final step of the subsequent grinding process.
  • Steam generated in the grinding apparatus and withdrawn from the latter through a conduit connected to the interior of the grinding housing, either ahead of or behind the grinding space, in the direction of flow between the grinding discs, may be used for preheating the chips.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
US06/160,253 1976-03-19 1980-06-17 Method and apparatus for producing fiber pulp from fibrous lignocellulose containing material Expired - Lifetime US4283252A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7603464 1976-03-19
SE7603464A SE419659B (sv) 1976-03-19 1976-03-19 Sett och anordning for framstellning av fibermassa av fiberformigt lignocellulosahaltigt material

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US05937411 Continuation 1978-08-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US06/223,986 Division US4457804A (en) 1976-03-19 1981-01-12 Apparatus for producing fiber pulp from fibrous lignocellulose containing material

Publications (1)

Publication Number Publication Date
US4283252A true US4283252A (en) 1981-08-11

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US06/160,253 Expired - Lifetime US4283252A (en) 1976-03-19 1980-06-17 Method and apparatus for producing fiber pulp from fibrous lignocellulose containing material
US06/223,986 Expired - Fee Related US4457804A (en) 1976-03-19 1981-01-12 Apparatus for producing fiber pulp from fibrous lignocellulose containing material

Family Applications After (1)

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US06/223,986 Expired - Fee Related US4457804A (en) 1976-03-19 1981-01-12 Apparatus for producing fiber pulp from fibrous lignocellulose containing material

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US (2) US4283252A (fr)
JP (1) JPS6035473B2 (fr)
BR (1) BR7701695A (fr)
CA (1) CA1065663A (fr)
DE (1) DE2711567A1 (fr)
FI (1) FI63788C (fr)
FR (1) FR2344666A1 (fr)
GB (1) GB1572648A (fr)
NO (1) NO148078C (fr)
SE (1) SE419659B (fr)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406734A (en) * 1979-10-10 1983-09-27 Sunds Defibrator Ab Method for the manufacture of mechanical pulp
US4445973A (en) * 1979-10-10 1984-05-01 Sunds Defibrator Ab Method and device for the manufacture of mechanical pulp
WO1984004113A1 (fr) * 1983-04-12 1984-10-25 Sunds Defibrator Procede et appareil pour fabriquer de la pate fibreuse
WO1985003730A1 (fr) * 1984-02-15 1985-08-29 Thune-Eureka A/S Appareil pour epaissir et raffiner des suspensions de pulpe de fibres
US5034099A (en) * 1987-04-15 1991-07-23 Sunds Defibrator Aktiebolag Apparatus for the manufacture of fiber pulp using a preheater, defibrator and horizontal separator
US5074476A (en) * 1989-02-07 1991-12-24 Bison-Werke Baehre Method of manufacturing fibre material containing lignocellulose for the production of fibre boards
EP0609542A1 (fr) * 1993-02-01 1994-08-10 Sunds Defibrator Industries Aktiebolag Procédé pour la production de pulpe de fibres
US6073865A (en) * 1997-03-26 2000-06-13 Voith Sulzer Papiertechnik Patent Gmbh Process and devices for manufacturing a hot friable material
US6250573B1 (en) * 1997-03-26 2001-06-26 Voith Sulzer Papiertechnik Patent Gmbh Process and device for the dispersion of a fibrous paper material
US20030041985A1 (en) * 2001-03-20 2003-03-06 Masood Akhtar Method for producing pulp
EP1317321A4 (fr) * 2000-03-14 2003-06-11 Komar Ind Inc Systeme et procede de traitement des matieres residuelles
US6651839B2 (en) 2001-01-19 2003-11-25 Voith Paper Patent Gmbh Device for hot dispersing fibrous paper stock and a method hot dispersing the stock
US20040154760A1 (en) * 2001-08-07 2004-08-12 Trevor Dean Paper plant - method and apparatus for producing pulp from cellulosic fibrous raw materials and recovering chemicals and energy from pulp liquors
US20060006264A1 (en) * 2004-07-08 2006-01-12 Sabourin Marc J Energy efficient TMP refining of destructured chips
US20060201641A1 (en) * 2001-08-07 2006-09-14 Bioregional Minimills (Uk) Limited Methods for producing pulp and treating black liquor
US20070164143A1 (en) * 2004-07-08 2007-07-19 Sabourin Marc J Disc refiner with increased gap between fiberizing and fibrillating bands
US20080142181A1 (en) * 2002-07-19 2008-06-19 Andritz, Inc. High defiberization chip pretreatment apparatus
US8096064B2 (en) * 2007-01-26 2012-01-17 Forestry And Forest Products Research Institute Method for drying lumber, method of impregnating lumber with chemicals, and drying apparatus
US9656863B2 (en) 2012-12-20 2017-05-23 Air Products And Chemicals, Inc. Method and apparatus for feeding municipal solid waste to a plasma gasifier reactor
CN107090729A (zh) * 2017-06-22 2017-08-25 北塘区军之印纸品加工厂 一种纸品生产原料用研磨机
WO2021225498A1 (fr) 2020-05-07 2021-11-11 Valmet Ab Ensemble défibreur et procédé de surveillance d'un ensemble défibreur
US20230047528A1 (en) * 2020-04-01 2023-02-16 Andritz Ag Apparatus for Grinding a Fibrous Material Suspension
EP4146861A4 (fr) * 2020-05-07 2024-06-26 Valmet Ab Système et procédé pour défibrer des copeaux de bois et tuyau de vapeur de retour

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI61215B (fi) * 1976-11-23 1982-02-26 Defibrator Ab Saett och anordning att kontinuerligt framstaella lignocellulosahaltiga fibermaterial
JPS5519570A (en) * 1978-07-28 1980-02-12 Matsushita Electric Works Ltd Preparation of smoothly planed veneer and pressurizing clamping device used for said method
FI59272C (fi) * 1980-03-25 1981-07-10 Enso Gutzeit Oy Skivraffinoer
SE430618B (sv) * 1980-12-23 1983-11-28 Sunds Defibrator Forfarande och slipverk for framstellning av fibermassa fran lignocellulosahaltigt material, sasom vedflis eller liknande
SE429874B (sv) * 1982-02-16 1983-10-03 Sunds Defibrator Sett och anordning vid framstellning av fibermassa an lignocellulosahaltigt material
CA1246374A (fr) * 1983-10-24 1988-12-13 Steve Rowland Affineur bi-etage pour pates extra-consistantes
US5108040A (en) * 1989-04-28 1992-04-28 Larry Koenig Tapered auger shredder
US4986480A (en) * 1989-06-29 1991-01-22 Kamyr Ab Method and apparatus for feeding a conical refiner
SE467463B (sv) * 1989-09-19 1992-07-20 Sunds Defibrator Ind Ab Anordning foer raffinering av cellulosahaltigt material i form av flis
CA2056092C (fr) * 1991-11-25 1994-11-29 Arne Ahlen Vis a extension
IL107932A0 (en) * 1992-12-08 1994-04-12 Miroevski Piotr Ravilevich Method and apparatus for producing a silicon based binding composition and product prepared therefrom
AT405537B (de) * 1997-02-14 1999-09-27 Andritz Patentverwaltung Vorrichtung zur entwässerung und zerfaserung von lignozellulosem material
US6451165B1 (en) * 2000-11-09 2002-09-17 Voith Paper, Inc. Channel pulper
US7146984B2 (en) * 2002-04-08 2006-12-12 Synecor, Llc Method and apparatus for modifying the exit orifice of a satiation pouch
SE528361C2 (sv) * 2005-04-18 2006-10-24 Metso Panelboard Ab Malhus
US8566857B2 (en) * 2005-09-20 2013-10-22 Forefront Assets Limited Liability Company Method, system and program product for broadcast advertising and other broadcast content performance verification utilizing digital artifacts
US8566858B2 (en) * 2005-09-20 2013-10-22 Forefront Assets Limited Liability Company Method, system and program product for broadcast error protection of content elements utilizing digital artifacts
WO2007035817A2 (fr) * 2005-09-20 2007-03-29 Celodata, Inc. Procede systeme et progiciel pour l'insertion et l'extraction d'artefacts d'identification dans des donnees transmises avec perte et sans perte
US8966517B2 (en) 2005-09-20 2015-02-24 Forefront Assets Limited Liability Company Method, system and program product for broadcast operations utilizing internet protocol and digital artifacts
JPWO2009034707A1 (ja) * 2007-09-11 2010-12-24 本田技研工業株式会社 セルロース系バイオマス原料の前処理方法
FI20105786A (fi) * 2010-07-09 2012-01-10 Upm Kymmene Corp Menetelmä ja järjestelmä lämmöneristeen raaka-aineen valmistamiseksi
US20200398321A1 (en) * 2019-06-24 2020-12-24 Mark E. Koenig System and method for separation of organics and liquids from waste material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396587A (en) * 1941-03-20 1946-03-12 American Defibrator Apparatus for producing pulp
US3215355A (en) * 1963-02-27 1965-11-02 Bauer Bros Co Feed means for a refiner
US3910505A (en) * 1973-04-27 1975-10-07 Rolf Bertil Reinhall Method of producing fiber pulp from vegetable of fibrous material

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2008892A (en) * 1932-03-29 1935-07-23 Defibrator Ab Method of manufacture of pulp
BE541433A (fr) * 1955-09-20
FR1254243A (fr) * 1960-04-14 1961-02-17 Defibrator Ab Raffineuse de pâte à papier ou de matière analogue
FR1300978A (fr) * 1961-07-04 1962-08-10 Escher Wyss Gmbh Procédé pour la préparation de fibres en suspension, notamment dans la fabrication du papier
FR1328671A (fr) * 1962-07-10 1963-05-31 Black Clawson Co Machines à papier
GB1047367A (fr) * 1964-09-25
US3371873A (en) * 1966-03-24 1968-03-05 Keith V. Thomas Refining apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396587A (en) * 1941-03-20 1946-03-12 American Defibrator Apparatus for producing pulp
US3215355A (en) * 1963-02-27 1965-11-02 Bauer Bros Co Feed means for a refiner
US3910505A (en) * 1973-04-27 1975-10-07 Rolf Bertil Reinhall Method of producing fiber pulp from vegetable of fibrous material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Defibrator News, 1:1974, pp. 1-12. *

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406734A (en) * 1979-10-10 1983-09-27 Sunds Defibrator Ab Method for the manufacture of mechanical pulp
US4445973A (en) * 1979-10-10 1984-05-01 Sunds Defibrator Ab Method and device for the manufacture of mechanical pulp
WO1984004113A1 (fr) * 1983-04-12 1984-10-25 Sunds Defibrator Procede et appareil pour fabriquer de la pate fibreuse
AU570680B2 (en) * 1983-04-12 1988-03-24 Sunds Defibrator Aktiebolag Method and apparatus for making fibre pulp
US4954221A (en) * 1983-04-12 1990-09-04 Sunds Defibrator Aktiebolag Apparatus for feeding lignocellulose-containing material through a steam screen into a refiner
WO1985003730A1 (fr) * 1984-02-15 1985-08-29 Thune-Eureka A/S Appareil pour epaissir et raffiner des suspensions de pulpe de fibres
US4684073A (en) * 1984-02-15 1987-08-04 Thune-Eureka A/S Apparatus for thickening and refining fibre-pulp suspensions
US5034099A (en) * 1987-04-15 1991-07-23 Sunds Defibrator Aktiebolag Apparatus for the manufacture of fiber pulp using a preheater, defibrator and horizontal separator
US5074476A (en) * 1989-02-07 1991-12-24 Bison-Werke Baehre Method of manufacturing fibre material containing lignocellulose for the production of fibre boards
EP0609542A1 (fr) * 1993-02-01 1994-08-10 Sunds Defibrator Industries Aktiebolag Procédé pour la production de pulpe de fibres
US6073865A (en) * 1997-03-26 2000-06-13 Voith Sulzer Papiertechnik Patent Gmbh Process and devices for manufacturing a hot friable material
US6250573B1 (en) * 1997-03-26 2001-06-26 Voith Sulzer Papiertechnik Patent Gmbh Process and device for the dispersion of a fibrous paper material
US6634583B2 (en) 1997-03-26 2003-10-21 Voith Paper Patent Gmbh Process and device for the dispersion of a fibrous paper material
EP1317321A4 (fr) * 2000-03-14 2003-06-11 Komar Ind Inc Systeme et procede de traitement des matieres residuelles
EP1317321A2 (fr) * 2000-03-14 2003-06-11 Komar Industries, Inc. Systeme et procede de traitement des matieres residuelles
US6752337B2 (en) 2000-03-14 2004-06-22 Larry E. Koenig System and method for treating process material
US6651839B2 (en) 2001-01-19 2003-11-25 Voith Paper Patent Gmbh Device for hot dispersing fibrous paper stock and a method hot dispersing the stock
US20030041985A1 (en) * 2001-03-20 2003-03-06 Masood Akhtar Method for producing pulp
US7306698B2 (en) 2001-03-20 2007-12-11 Biopulping International Method for producing pulp
US20040154760A1 (en) * 2001-08-07 2004-08-12 Trevor Dean Paper plant - method and apparatus for producing pulp from cellulosic fibrous raw materials and recovering chemicals and energy from pulp liquors
US20060201641A1 (en) * 2001-08-07 2006-09-14 Bioregional Minimills (Uk) Limited Methods for producing pulp and treating black liquor
US7892400B2 (en) * 2002-07-19 2011-02-22 Andritz Inc. High defiberization chip pretreatment apparatus
US20080142181A1 (en) * 2002-07-19 2008-06-19 Andritz, Inc. High defiberization chip pretreatment apparatus
JP2006022465A (ja) * 2004-07-08 2006-01-26 Andritz Inc サーモメカニカルパルプ製造装置および方法
US20060006264A1 (en) * 2004-07-08 2006-01-12 Sabourin Marc J Energy efficient TMP refining of destructured chips
US7300540B2 (en) * 2004-07-08 2007-11-27 Andritz Inc. Energy efficient TMP refining of destructured chips
US20080078854A1 (en) * 2004-07-08 2008-04-03 Sabourin Marc J Composite refiner plate
US20070164143A1 (en) * 2004-07-08 2007-07-19 Sabourin Marc J Disc refiner with increased gap between fiberizing and fibrillating bands
US7713381B2 (en) 2004-07-08 2010-05-11 Andritz Inc. TMP refining of destructured chips
US7758726B2 (en) 2004-07-08 2010-07-20 Andritz Inc. Disc refiner with increased gap between fiberizing and fibrillating bands
CN1718914B (zh) * 2004-07-08 2010-08-11 安德里兹有限公司 在转盘精制机中用已被蒸煮的木片生产热机械纸浆的系统
US7846294B2 (en) 2004-07-08 2010-12-07 Andritz Inc. Method of refining destructured chips
US20070272778A1 (en) * 2004-07-08 2007-11-29 Sabourin Marc J TMP Refining of destructured chips
JP2011069042A (ja) * 2004-07-08 2011-04-07 Andritz Inc サーモメカニカルパルプ製造装置および方法
JP4674125B2 (ja) * 2004-07-08 2011-04-20 アンドリッツ インコーポレーテッド サーモメカニカルパルプ製造装置
CN102505552A (zh) * 2004-07-08 2012-06-20 安德里兹有限公司 具有内部纤维化区的高强度精制机板
US8096064B2 (en) * 2007-01-26 2012-01-17 Forestry And Forest Products Research Institute Method for drying lumber, method of impregnating lumber with chemicals, and drying apparatus
US9656863B2 (en) 2012-12-20 2017-05-23 Air Products And Chemicals, Inc. Method and apparatus for feeding municipal solid waste to a plasma gasifier reactor
CN107090729A (zh) * 2017-06-22 2017-08-25 北塘区军之印纸品加工厂 一种纸品生产原料用研磨机
US20230047528A1 (en) * 2020-04-01 2023-02-16 Andritz Ag Apparatus for Grinding a Fibrous Material Suspension
WO2021225498A1 (fr) 2020-05-07 2021-11-11 Valmet Ab Ensemble défibreur et procédé de surveillance d'un ensemble défibreur
EP4146859A4 (fr) * 2020-05-07 2024-06-19 Valmet Ab Ensemble défibreur et procédé de surveillance d'un ensemble défibreur
EP4146861A4 (fr) * 2020-05-07 2024-06-26 Valmet Ab Système et procédé pour défibrer des copeaux de bois et tuyau de vapeur de retour

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FI63788C (fi) 1983-08-10
FR2344666B1 (fr) 1982-07-09
NO148078C (no) 1983-08-03
SE419659B (sv) 1981-08-17
DE2711567A1 (de) 1977-09-22
FI63788B (fi) 1983-04-29
US4457804A (en) 1984-07-03
FR2344666A1 (fr) 1977-10-14
CA1065663A (fr) 1979-11-06
JPS5310702A (en) 1978-01-31
NO770975L (no) 1977-09-20
NO148078B (no) 1983-04-25
JPS6035473B2 (ja) 1985-08-14
SE7603464L (sv) 1977-09-20
FI770862A (fr) 1977-09-20
GB1572648A (en) 1980-07-30
BR7701695A (pt) 1977-11-08

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